Previous Night, think of the Goddess and mentally decide to perform puujaa the next day.
This is the sankalpa. Next day early morning keep the same thoughts of worshipping the
Goddess and take a head-bath (if possible an oil-bath). Have some soothing Indian Music
(Shehnai or sa.ntuur or sitaar or naadasvaram - preferably any instrumental) going
on in the background till the puujaa begins. The music should be pleasing (not too loud)
for creating a serene mood. (Of course people should be internally peaceful also!)

Wash Kalasha and fill it with clean water upto 3/4 of it. Cover and
place it near the altar. Observe Fast (if possible). Decorate the front door,
altar and the place near the altar. Invite your relatives, friends (who have bhakti
in the Goddess). Keep all the things for puujaa ready, near the altar.